Suzy's right- we've all been there feeding food that we wish we knew was bad- but its ok- it's never too late to change foods
Choose foods that have no bi products (Those are the parts of animals that are not fit for human conusmptions- diseased animals, heads... feet.. you get it
) no corn (usually an allergen) no wheat (also an allergen) and I would also stay away form anything with beet pulp (a controversial ingredient so i stay away from it all together).
Look for food where protein is the #1 and #2 food- like chicken or venison or fish. I also like grain free food- I don' think dogs need it and it is just a filler.
yogurt is great Layla gets vanilla fat free pro biotic yogurt twice a day- she loves it!